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Numerical simulation on slope stability analysis considering anisotropic properties of layered fractured rocks: a case study

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Abstract

Anisotropy is one of the natural properties of layered fractured rock, and it plays an important role in slope stability analysis, which is a vital problem in the geotechnical engineering. However, in the present engineering design, rock mass is simply treated as isotropic material, which fails to take into account the anisotropic properties. This work begins with formulizations of the anisotropic seepage-stress coupled model for the layered fractured rock slope stability analysis based on the equivalent continuum theory. Next, the model is applied in the numerical simulation of the southern slope of an open-pit mine in China to understand the mechanism of the existing failure strain as well as the failure mechanism of the potential landslide. The computed water table and damage zone have been compared with the field measurements and found to be in good agreement with field observations. Finally, the effective measures to prevent the slope failure and strengthen the slope stability have been suggested. The proposed model successfully applied in the case study indicated that it is much more feasible and efficient comparing with using the traditional isotropic coupled model in such layered fractured rock slopes stability problems.

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Acknowledgments

We thank the engineers of China West Open-pit Mine of Fushun Mining Group and Shenyang Branch of China Coal Research Institute for their geological data of this study. This research is financially supported by the National Science Foundation of China (Grant No. 51174045, 51034001), the basic scientific research funds of Ministry of Education of China (No. N120601002), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120042120053) also give financial support to this research.

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Correspondence to Wen-hao Shi.

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Yang, Th., Shi, Wh., Wang, Pt. et al. Numerical simulation on slope stability analysis considering anisotropic properties of layered fractured rocks: a case study. Arab J Geosci 8, 5413–5421 (2015). https://doi.org/10.1007/s12517-014-1609-2

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  • DOI: https://doi.org/10.1007/s12517-014-1609-2

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